Compatible optical recording medium
AssigneeThomson Licensing
InventorJoachim Knittel
Life of this patent
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Abstract
The present invention relates to a format of a recordable optical recording medium, which is designed in such a way that it can be read by any standard player and recorder. The optical recording medium has a recording layer with a structure of lands and grooves, which generates a strong push-pull signal in an area of the recording layer without recorded marks and a small push-pull signal in an area of the recording layer with recorded marks.
Claims8
An optical recording medium with a recording layer having a structure of lands and grooves, which generates a strong push-pull signal in an area of the recording layer without recorded marks and a small push-pull signal in an area of the recording layer with recorded marks, wherein an absolute value of the normalized strong push-pull signal is larger than 0.2 and an absolute value of the normalized small push-pull signal is lower than 0.1, wherein the recorded marks generate an additional push-pull signal, which is 180±20 degrees out of phase with the push-pull signal caused by the structure of lands and grooves.
Dependencies are inferred from the claim text.